IF a membrane is rich in phospholipids, w/ unsaturated hydrocarbons, it will be more___

fluid

Secretory proteins leave the ER in membranes of vesicales from a special region called:

transitional ER

what instrument do you use to fractionate cells?

centrifuge (really powerful ones: ultracentrifuge)

Different cisternae contain different __________

enzymes

Tight Junctions

prevent leakage. keep contents of one cell separate from the other

the thylakoid membrane divides the interior of hte chloroplast into 2 compartments:

the thylakoid space and the stroma
chloroplasts are mobile!

what is ER?

membranous labyrinth that it accounts for more than half of the total membrane in many cells

what is a glyoxysomes

convert fatty acids to suagar, type of peroxisomes

The various kinds of intermediate filaments can function as the framework of the entire cytoskeleton

also can reinforce the shape and fix positions of organelles

the most recent addition to the list of possible cytoskeletal funcions is:

redulation of biochemical activities in the cell, it may trasmit mechanical forces fromthe surface of the cell to the interior

how does the nucleus control protein synthesis?

makes mRNA in the nucleus according to directions from DNA, then mRNA conveys the genetic messages to cytoplasm. Then mRNA attaches to ribsomes, where the message is translated into the primary sturcture of the protein.

the large vacuole of a plant cell develops by the coalesces of _____

smaller vacuoles.

A membrane at some critical temp. phospholipids settle into a closely packed arragnement and the membrane solidifies, this depends on...

lipid concentration.

The cytoskeleton has many functions:

gives mechanical support, aslo it is very dynamic and it changes

Smooth ER makes:

sex hormones

chromoplats are

enriched in pigments and give fruit and flowers color.

the doublets do not move, instead, the forces exerted by the ____ cause the doublets to curve, which bends the cilia or flagella